Low Voltage CMOS RF Voltage-Controlled Oscillator and Phase-Locked Loop Design
| Autor: | Hsien-Hung Chiu, 邱顯鴻 |
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| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 The low power consumption plays an important role in RFIC’s for wireless communication transceiver. RFIC usually consists of Mixer, Voltage-Controlled Oscillator (VCO), Filter, Power Amplifier, etc. One of important component is VCO in power consumption issue. In this thesis a low voltage operation circuit for VCO and Phase-Locked Loop (PLL) is developed. The TSMC 0.18μm RF CMOS manufacture Technology is used for ultra low voltage VCO and low voltage phase-locked loop which can be applied to UWB system and dual band quadrature phase voltage-controlled oscillator which can be applied to WiFi system. There are three kinds of low voltage VCOs be implemented with different circuit characteristics. The first kind of VCO uses LC tank with NMOS cross-coupled pair and cross-paralleled capacitor improving the quality factor in the active port. The measured power consumption of VCO core circuit draws only 0.54mW and FOM value is 185. The second kind of VCO modfines to bulk to decreasing noise induces. That improves traditions quadrature phase VCO phase noise. The measured power consumption of VCO core circuit is 2.67mW and FOM value is 181.7 under 0.65V supply. The third kind of dual band low power QVCO simplify traditions dual band VCO circuit and adopts current-reuse topology. The measured power consumption of DB-QVCO core circuit is 5.46mW and 6.75mW under 1.3V and 1.5V supply for low band and high band. FOM value is both 171. The second part designs low voltage PLLs that can be applied to UWB system. PLLs output frequency is 5.016GHz and including I/Q signals. The low voltage PLL adopts level shift current mode logic (LS-CML) divider at the 1st stage divider. Using reform pre-charge phase frequency detector (PFD) and refine true single phase clock (TSPC) divider. The whole loop simulated power dissipation is 5.58mW. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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